TEC control circuit and optical assembly

Abstract

The invention discloses a TEC control circuit and an optical assembly. A signal feedback end of a temperature threshold setting circuit included in the TEC control circuit is connected with an outputend of an optical assembly. The output end of the temperature threshold setting circuit is connected with the control end of the integral feedback circuit, the output end of the integral feedback circuit is connected with the input end of the TEC controller, the output end of the TEC controller is connected with a TEC in the optical assembly, and the threshold setting end of the temperature threshold setting circuit is connected with the inverting input end of the integral feedback circuit. The temperature threshold setting circuit is used for setting a target temperature voltage value in theTEC control circuit, comparing the target temperature voltage value with a temperature feedback voltage value of the thermistor and outputting a level signal to the integral feedback circuit; the integral feedback circuit is used for adjusting the numerical range of the integral constant according to the on / off of the second integral circuit, and outputting an integral feedback signal to the TEC controller; and the TEC controller is used for outputting the corresponding TEC current to the TEC in the optical assembly. According to the TEC control circuit, the reliability of the TEC control circuit is improved.

Description

technical field [0001] The invention relates to the technical field of optical signal detection, in particular to a TEC control circuit and an optical component. Background technique [0002] At present, in the medium and long-distance high-speed optical components, the stability of the emission wavelength is highly required. Because the operating temperature of the optical component will affect the stability of the emission wavelength, a large number of TEC (ThermoElectric Cooler) is used to control the temperature of the laser in the optical component to keep the emission wavelength of the laser in the optical component stable. [0003] However, in related technologies, if the TEC circuit needs to be stabilized quickly, the current will rise too fast, resulting in a large overshoot, forming long-term oscillation, and the stable time becomes longer; if it is necessary to control the formation of overshoot without causing long-term oscillation, then The rise of the current ...

AI Technical Summary

Problems solved by technology

[0003] However, in related technologies, if the TEC circuit needs to be stabilized quickly, the current will rise too fast, resulting in a large overshoot, forming long-term oscillation, and the stable time becomes longer; if it is necessary to control the formation of the overshoot without causing long-term oscillation, then The rise of the current will be slowed down, and the time for the TEC circuit to stabilize will also be prolonged

Generally speaking, the laser will only be turned on to emit light after the TEC is stable, so if the time for the TEC to stabilize is too long, the laser will emit light too late and cannot meet the application requirements

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